As one of the largest countries by landmass in the world, the United States of America observes several time zones across the country. The U.S. has the second-most number of time zones within a country. Each Time zone by zip code is divided by color and state below.
United States Time Zones by Zip code
The United States and its territories are divided into 11 total time zones. These 11 time zones are categorized into four specific regions.
Mainland U.S.
TIME ZONES
STANDARD TIME
DAYLIGHT SAVING TIME
Eastern Time Zone
UTC-05:00
UTC-04:00
Central Time Zone
UTC-06:00
UTC-05:00
Mountain Time Zone
UTC-07:00
UTC-06:00
Pacific Time Zone
UTC-08:00
UTC-07:00
States beyond the Mainland U.S.
TIME ZONES
STANDARD TIME
DAYLIGHT SAVING TIME
Alaska Time Zone
UTC-09:00
UTC-08:00
Hawaiian-Aleutian
UTC-10:00
UTC-11:00
U.S. Territories
TIME ZONES
STANDARD TIME
DAYLIGHT SAVING TIME
Samoa Time Zone
UTC-11:00
N/A
Chamorro Time Zone
UTC-10:00
N/A
Atlantic Time Zone
UTC-08:00
N/A
Minor Outlying Islands
TIME ZONES
STANDARD TIME
DAYLIGHT SAVING TIME
Baker Island
UTC-12:00
N/A
Wake Island
UTC+08:00
N/A
States and Territories within the Zones
Eastern Time Zone (EST)
STATES/TERRITORIES
PARTIALLY
NO DST OBSERVED
Connecticut
Florida
Navassa Island
Delaware
Indiana
Bajo Nuevo Bank
District of Columbia
Kentucky
Serranilla Bank
Georgia
Michigan
Maine
Tennessee
Maryland
Massachusetts
New Hampshire
New Jersey
New York
North Carolina
Ohio
Pennsylvania
Rhode Island
South Carolina
Vermont
Virginia
West Virginia
Central Time Zone (CST)
STATES/TERRITORIES
PARTIALLY
Alabama
Florida
Arkansas
Indiana
Illinois
Kansas
Iowa
Kentucky
Louisiana
Michigan
Minnesota
Nebraska
Mississippi
North Dakota
Missouri
South Dakota
Oklahoma
Tennessee
Wisconsin
Texas
Mountain Time Zone (MST)
STATES/TERRITORIES
PARTIALLY
Arizona (no DST outside of Navajo Nation)
Idaho
Colorado
Kansas
Montana
Nebraska
New Mexico
Nevada
Utah
North Dakota
Wyoming
Oregon
South Dakota
Texas
Pacific Time Zone (PST)
STATES/TERRITORIES
PARTIALLY
California
Idaho
Washington
Nevada
Oregon
Alaskan Time Zone (AKST)
PARTIALLY
Alaska
Hawaiian-Aleutian Time Zone (HST)
PARTIALLY
NO DST OBSERVED
Alaska
Hawaii
Johnston Astoll
Samoa Time Zone (SST)
STATES/TERRITORIES
American Samoa
Jarvis Island
Midway Atoll
Palmyra Atoll
Kingman Reef
Chamorro Time Zone (ChST)
STATES/TERRITORIES
Guam
Northern Mariana Islands
Atlantic Time Zone (AST)
STATES/TERRITORIES
Puerto Rico
U.S. Virgin Islands
Daylight Savings Time
Daylight Savings Time (DST) is the method of setting the clock forward to an hour during longer daytimes to have more daylight in the evening. This year, the U.S. Daylight Savings Time will be observed from the second Sunday in March until the first Sunday in November. The “spring forward, fall back” method perfectly aligns with the seasons during DST. Clocks move forward an hour from 2:00am to 3:00am in the springtime, then back from 2:00am to 1:00am in the fall.
Next only to France, the United States of America has the second-most number of time zones observed by the country and its territories.
